Yamaha prefer to pack a LOT of info on the screen at the same time, especially the MoXS series. You'd have to have very tiny fingers to not end up pressing the wrong thing all the time, IMO!
Touch screens got a pretty bad rep from when they first appeared in keyboards... they were slow to respond, unreliable, harder to read. Things have definitely improved since the Triton days!
I just wish they were bigger, and could display more, and STILL have room for you fingers. That new FantomG display is lovely! Can't wait to see that on an arranger!
Maybe a combination of touch screen for live use, with big enough areas for the fingers to be reliable, and then a mouse input for doing detail work, like sequencing or style edit/creation, where you want to see a LOT of things at the same time... Now THAT would be cool!
As to the fanboy comments from Fran... sorry, but I think EVERY arranger has some strong points and some weak. It is up to US to make sure that flaws are not concealed in the name of one-upmanship. Roland have my thumbs up for things like the Makeup Tools and sequencer, but fall behind with things like the lack of multipads and some odd operational things (that damn ACC cutoff on Chord Type change, for one), so there is no one dominant OS, IMO.